JP-7857263-B2 - A method and apparatus for a terminal to receive a downlink signal based on an arbitrary connection process in an unlicensed band.

Inventors

• イ チョンス
• ユン ソクヒョン
• コ ヒョンス
• キム ソンウク

Assignees

• エルジー エレクトロニクス インコーポレイティド

Dates

Publication Date

20260512

Application Date

20231114

Priority Date

20191004

Claims (12)

1. The stage in which the terminal sends message A to the network, The terminal includes the step of receiving a RAR (Random Access Response) in message B from the network during the window, Based on the fact that the PRACH (Physical Random Access Channel) preamble maps to a valid PUSCH (Physical Uplink Shared Channel) opportunity, i) In response to the transmission of PRACH only without PUSCH in message A, and, ii) In response to the transmission of PRACH and PUSCH in message A, A method wherein the window for detecting the message B begins at least one symbol after the last symbol of the PUSCH opportunity corresponding to the transmission of the PRACH.
2. The method according to claim 1, wherein, based on the fact that message B includes a fallback RAR, the fallback RAR includes UL (uplink) grant information.
3. The UL grant information is processed, and a PUSCH transmission is performed . The method according to claim 2, wherein once the PUSCH is transmitted , information related to conflict resolution is received.
4. The method according to claim 1, wherein the window starts with the first symbol of the resource associated with the reception of message B.
5. At least one processor, The system comprises at least one memory that is operably connected to the at least one processor and stores instructions that operate based on being executed by the at least one processor, The aforementioned operation is, Sending message A and This includes receiving a RAR (Random Access Response) in message B during the window, Based on the fact that the PRACH (Physical Random Access Channel) preamble maps to a valid PUSCH (Physical Uplink Shared Channel) opportunity, i) In response to the transmission of PRACH only without PUSCH in message A, and, ii) In response to the transmission of PRACH and PUSCH in message A, The window for detecting message B begins at least one symbol after the last symbol of the PUSCH opportunity corresponding to the transmission of PRACH, in the device.
6. Based on the fact that message B includes a fallback RAR, the device according to claim 5, wherein the fallback RAR includes UL (uplink) grant information.
7. The UL grant information is processed, and a PUSCH transmission is performed . The device according to claim 6, wherein once the PUSCH is transmitted , information related to conflict resolution is received.
8. The apparatus according to claim 5, wherein the window starts with the first symbol of the resource associated with the reception of message B.
9. At least one transceiver, At least one processor, The system comprises at least one memory that is operably connected to the at least one processor and stores instructions that operate based on being executed by the at least one processor, The aforementioned operation is, Sending message A and This includes receiving a RAR (Random Access Response) in message B during the window, Based on the fact that the PRACH (Physical Random Access Channel) preamble maps to a valid PUSCH (Physical Uplink Shared Channel) opportunity, i) In response to the transmission of PRACH only without PUSCH in message A, and, ii) In response to the transmission of PRACH and PUSCH in message A, The window for detecting message B begins at least one symbol after the last symbol of the PUSCH opportunity corresponding to the transmission of PRACH at the terminal.
10. The terminal according to claim 9, wherein, based on the fact that message B includes a fallback RAR, the fallback RAR includes UL (uplink) grant information.
11. The UL grant information is processed, and a PUSCH transmission is performed . The terminal according to claim 10, wherein once the PUSCH is transmitted , information related to conflict resolution is received.
12. The terminal according to claim 9, wherein the window starts with the first symbol of the resource associated with receiving message B.

Description

This disclosure relates to a method and apparatus for receiving downlink signals in an unlicensed band based on an arbitrary connection process, and more particularly, to a method and apparatus for receiving downlink signals in an unlicensed band based on a two-stage arbitrary connection process and DRX (Discontinuous Reception) operation. 5G is a means of delivering streams rated at hundreds of megabits per second to gigabits per second, and can complement FTTH (fiber-to-the-home) and cable-based broadband (or DOCSIS). Such high speeds are required for virtual and augmented reality, as well as for transmitting TV at resolutions of 4K and above (6K, 8K, and beyond). VR (Virtual Reality) and AR (Augmented Reality) applications mostly include immersive sports competitions. Certain application programs may require special network configurations. For example, in the case of VR games, game companies must integrate their core servers with the network operator's edge network servers to minimize latency. Automobiles are expected to be a key new driving force in 5G, along with numerous use cases for mobile communications within vehicles. For example, passenger entertainment requires high capacity and high mobility mobile broadband simultaneously, because future users will continue to expect high-quality connectivity regardless of their location and speed. Another use case in the automotive sector is augmented reality dashboards, which overlay information on what the driver sees through the windshield, identifying objects in the dark and informing the driver about their distance and movement. In the future, wireless modules will enable communication between vehicles, information exchange between vehicles and supporting infrastructure structures, and information exchange between vehicles and other connected devices (e.g., devices accompanying pedestrians). Safety systems will guide drivers towards alternative routes of action to enable safer driving and reduce the risk of accidents. The next stage will be remotely controlled or self-driven vehicles. This requires highly reliable and extremely fast communication between different self-driving vehicles and between vehicles and infrastructure. In the future, self-driving vehicles will handle all driving activities, allowing drivers to focus only on traffic anomalies that the vehicle itself cannot identify. The technical requirements for self-driving vehicles demand ultra-low latency and ultra-high-speed reliability to increase traffic safety to a level unattainable by humans. Smart cities and smart homes, often referred to as smart societies, will be embedded in high-density wireless sensor networks. Distributed networks of intelligent sensors will identify the requirements for cost-effective and energy-efficient maintenance of cities or homes. Similar setups can be implemented for individual households. Temperature sensors, window and heating controllers, burglar alarms, and household appliances will all be wirelessly connected. Many of these sensors typically have low data transmission speeds, low power consumption, and low cost. However, real-time HD video, for example, may be required for certain types of devices for surveillance purposes. The consumption and distribution of energy, including heat and gas, is becoming highly decentralized, requiring automated control of distributed sensor networks. Smart grids interconnect these sensors using digital information and communication technologies to collect information and act accordingly. This information can include provider and consumer behavior, enabling smart grids to improve efficiency, reliability, economics, production sustainability, and the automated distribution of fuels such as electricity. A smart grid can be thought of as another low-latency sensor network. The healthcare sector possesses numerous application programs that can benefit from mobile communication. Communication systems can support telemedicine, providing clinical care from remote locations. This helps reduce distance barriers and improve access to healthcare services that are not sustainably available in remote rural areas. It can also be used to save lives in critical medical and emergency situations. Mobile communication-based wireless sensor networks can provide remote monitoring and sensing for parameters such as heart rate and blood pressure. Wireless and mobile communications are becoming increasingly important in industrial applications. Wiring incurs high installation and maintenance costs. Therefore, the possibility of replacing cables with reconfigurable wireless links presents an attractive opportunity in many industrial sectors. However, achieving this requires wireless connectivity to operate with similar latency, reliability, and capacity to cables, and to be simplified in its management. Low latency and extremely low error probability are new requirements that need to be met by 5G connectivity. Logistics and freight tracking are